AS58519: the CHINATELECOM-CTCLOUD Cloud Computing Corporation network

AS58519 is an internet Autonomous System operated by CHINATELECOM-CTCLOUD Cloud Computing Corporation (China). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS58519?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS58519 was assigned to CHINATELECOM-CTCLOUD Cloud Computing Corporation by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS58519 currently announces 192 IPv4 block(s), totaling about 515.6 thousand addresses (515,584 in all), registered in China. Services from CHINATELECOM-CTCLOUD Cloud Computing Corporation are reached through these addresses.

What it means to see AS58519 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS58519. That means the other end sits on the CHINATELECOM-CTCLOUD Cloud Computing Corporation network (China). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.